Improvement in vapor-engines



UNITED STATES PATENT OFFICE WILLIAM WELLS, OF SALEM, MASSACHUSETTS.

IMPROVEMENT IN VAPOR-ENGINES.

Specification forming part of Letters Patent No. 145,466, dated December 9, 1873; application filed October 29, 1873.

To all whom it may concern Be it known that I, WILLIAM WELLS, of Salem, in the county of Essex and State of Massachusetts, have invented an Improvel ment in Vapor-Engines, of which the following is a specification:

AThe object of this invention is to prevent the escape of the vapor about the piston-rod of vapor-engines, more particularly vapor-engines using the vapor of bisulphide of carbon. For this purpose the invention consists of constructing the piston-cylinder with an outside chamber, Which incases, or substantially so, the length ot' the piston-rod entering the piston-cylinder, and thus prevents its exposure to the external air, obviating radiation. This chamber receives the escaping1 gases, and from it a pipe is provided to conduct them back to the cylinder when desired.

In the accompanying plate of drawings, the present invention is illustrated by a central longitudinal section of a piston-cylinder.

A in the drawings represents the piston,

*and B its cylinder, of a vapor-engine; D, the

piston-rod attached to piston-head, and passing out of the cylinder at E, through a stuffingbox, F, as usual; Gr, a chamber surrounding the piston-rod outside of the cylinder. This chamber G is sufficient in length to-enlbrace substantially` the length of the piston-rod entering the piston-cylinder, and it surrounds the stuffing-box F of piston-cylinder, and! at H is provided with a stuffing-box, to paclr'the piston-rod. This chamber receives the ,escaping vapors from the piston cylinder, land also vapors escaping by radiation, and holds them from escape to the external air. c, a pipe, leading from the chamber G- to the pistoneylinder, for conducting the vapors back into the cylinder 5 b, a stop-cock in pipe a, to open and close the saine to the passage ofthe vapors from the chamber G to the piston-cylinder.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

The chamber G, arranged about the pistonrod and connected with the piston-cylinder of a vapor-engine, substantially as and for the purpose described.

The above specification of my invention signed by me this 21st day of October, A.*D. 187 3.

WI LLIAM WELLS.

Witnesses:

ALBERT W. BROWN, EDWIN W. BROWN. 

